Put them through the office door and they fall into the wrong hands. Sending them to the company proprietor or facilities manager may reach the correct person. However when i worked in facilities I never used to take much notice of such leaflets as they never seemed to arrive at the right time, put it like this I would be inundated with all manner of advertising from various companies, cleaning and none cleaning, but never had anything to hand when it came to needing to use the services that had been advertised. I never had the time nor facility to hang on to leaflets on the off-chance. Does much work materialise from advertising in this fashion?